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| Fish Diversity in Yibin Section in Autumn Based on eDNA Technology |
| DANG Yingchao, LI Sha, SU Wei, HU Fanxu, JIANG Wei |
1. Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China;
2. Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China |
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Abstract In order to explore a new method for survey of fish diversity in the Yibin River section, the fish diversity was detected in samples collected from 7 sampling sections from the downstream of the Jinsha River to the main stream section of Lizhuang Ancient Town, Yibin City (here referred to as the "Yibin River Section") from October 25 to 27, 2021 by environmental DNA metabarcoding (eDNA) technology. A total of 30 species of fish (excluding 2 genera, not identified at the species level) were detected from the environmental DNA samples in the Yibin section, belonging to 5 orders, 12 families and 29 genera, including 1 national-level protected fish species and 3 endemic fish species in the upper reaches of the Changjiang River. Coreius, Rhinogobius, Micropterus, and Liobagrus were found to be the dominant genera at each sampling section. It was found that the environmental DNA technology was characterized by high efficiency, high sensitivity and non-invasive compared with the traditional survey methods and used as an important supplementary tool for studying the fish diversity of relevant basins, even though it did not completely replace traditional methods. The finding enriches the structural and functional information of fish communities in the Yibin section and provides basic information for the evaluation of fishery ban effect.
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Received: 07 April 2023
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